Sika Technology AG

Baar, Switzerland

Sika Technology AG

Baar, Switzerland
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The present invention relates to an accelerator for hydraulic binding agents, comprising at least one phosphoric acid ester of a multivalent alcohol and at least one calcium compound. The accelerator according to the invention is capable of producing a very fast-curing mortar or concrete composition which has a high early strength and, nevertheless, very favourable processing properties and thus allows early dismantling or early loading and does not cause any losses in the final strength.


Patent
Sika Technology AG | Date: 2017-01-18

The present invention relates to a two-component composition comprising a polymer-polyol, optionally further polyols, an aldimine of the formula (I), a zirconium (IV) catalyst and, in the second component, diphenylmethane diisocyanate. The composition is particularly suitable as a solvent-free, low-odor elastic adhesive. The composition has a particularly long open time, a low density and a high level of final strength and cures quickly and without complications.


The invention relates to a quick-drying gypsum composition, in particular for use as gypsum filling compound and for the production of floorcoverings, wherein the gypsum composition contains 20 to 70% of a mixture of calcium aluminate and calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate as hydraulic binders and 30 to 80% by weight of fillers, and wherein the weight ratio of calcium aluminate to calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate binders lies in the range from 1:1 to 1:5. Gypsum compositions of this type are characterized by a particularly beneficial shrinkage behavior, such that stresses and cracks in the dried composition can be avoided. At the same time, the gypsum compositions dry to readiness for covering in a time that is compatible with conventional cement filling compounds.


Patent
Sika Technology AG | Date: 2017-05-17

Disclosed is a thermally expandable composition, comprising at least one polymer P, cross-linkable by peroxide, and between 1 wt.-% and 2.5 wt.-%, based on the total weight of the composition, of at least one acrylate A, and between 0.2 wt.-% and 2.5 wt.-%, based on the total weight of the composition, of at least one peroxide, and at least one blowing agent, characterised in that the equivalent ratio of said peroxide to said acrylate A is between 0.01 and 0.5, preferably between 0.13 and 0.41, and the weight ratio of said peroxide to said acrylate A is lower than 0.33 and said polymer P comprises or essentially consists of at least two polymers PI and P2, wherein PI exhibits a melt flow index (MFI) of between 100 and 200 g/10 min, and P2 exhibits a melt flow index of between 0.1 and 60 g/ 10 min, wherein MFI is determined by ASTM D1238. The thermally expandable composition shows excellent properties in terms of expansion stability and minimised buckling and is especially suitable for baffle and/or reinforcement elements, e.g. in automotive manufacturing.


Patent
Sika Technology AG | Date: 2017-02-15

The invention is directed to a method for producing a tire filled with a (meth)acrylic hydrogel, the method comprises a) providing a mixture comprising at least one water-soluble (meth)acrylic compound, water and an initiator, and b) filling the mixture in a tire in which the mixture polymerizes to form the (meth)acrylic hydrogel. The tire filling material is suitable for producing flat proof tires, enables fast and controlled cure and is insensitive towards dosage errors. Moreover, the tire filling material is environmental friendly and cost effective.


Patent
Sika Technology Ag | Date: 2017-03-01

[Problem] To provide a chemical agent whereby adjustment of air volume is easier, particularly in a hydraulic composition having fly ash blended therein. [Solution] An admixture for a hydraulic composition, having a structure indicated by generalformula (1)^(1)O indicates a C2-3 oxyalkylene group, n indicates an average added molar number for the oxyalkylene group A^(1)O of 2-150, m indicates an integer between 1 and 3, M indicates a hydrogen atom, an alkali metal atom, a group II metal atom, an ammonium group, or an organic ammonium group.)


Patent
Schwarz and Sika Technology AG | Date: 2017-05-03

The invention relates to a galvanic anode system for the corrosion protection of steel in concrete. The galvanic anode system according to the invention consists of a galvanic anode material, which consists of zinc and alloys thereof, embedded in a solid electrolyte, and is characterized in that the galvanically available surface is larger, preferably at least twice as large, as the total geometrical surface of the metal anode. The galvanic anode system according to the invention is also characterized in that, during operation, during which the anode disintegrates as a sacrificial anode, the galvanically active anode surface is reduced only slightly, preferably is not reduced up to at least 50%, in particular 75%, of the time during use.


A solidification and setting accelerator for hydraulic binders, in particular for shotcrete/gunite or sprayed mortar, comprises sulfate, aluminum and at least two chemically distinct organic acids, each of which contains at least one hydroxy group in addition to at least one acid group, the combined maximum content of the at least two organic acids being 1 wt% in relation to the total weight of the accelerator.


The invention relates to the use of a multi-component composition comprising A) a polyol component (A) comprising at least one polyol and water, B) a hardener component (B) comprising at least one polyisocyanate, and C) a solid component (C) comprising a hydraulic binder and one or more aggregates, as an early water resistant construction or repair material for constructing, repairing or refurbishing component parts, wherein the mixed and applied multi-component composition is immersed in water not later than 8 hours, preferably not later than 2 h, after application. The use as an early water resistant construction or repair material is especially suitable for component parts, which are in contact with water during operation such as offshore wind energy plants or water retaining systems, e.g. pipelines.


Grant
Agency: European Commission | Branch: H2020 | Program: RIA | Phase: NMP-19-2015 | Award Amount: 7.97M | Year: 2016

The main goal of the LORCENIS project is to develop long reinforced concrete for energy infrastructures with lifetime extended up to a 100% under extreme operating conditions. The concept is based on an optimal combination of novel technologies involving customized methodologies for cost-efficient operation. 4 scenarios of severe operating conditions are considered: 1. Concrete infrastructure in deep sea, arctic and subarctic zones: Offshore windmills, gravity based structures, bridge piles and harbours 2. Concrete and mortar under mechanical fatigue in offshore windmills and sea structures 3. Concrete structures in concentrated solar power plants exposed to high temperature thermal fatigue 4. Concrete cooling towers subjected to acid attack The goal will be realized through the development of multifunctional strategies integrated in concrete formulations and advanced stable bulk concretes from optimized binder technologies. A multi-scale show case will be realized towards service-life prediction of reinforced concretes in extreme environments to link several model approaches and launch innovation for new software tools. The durability of sustainable advanced reinforced concrete structures developed will be proven and validated within LORCENIS under severe operating conditions based on the TRL scale, starting from a proof of concept (TRL 3) to technology validation (TRL 5). LORCENIS is a well-balanced consortium of multidisciplinary experts from 9 universities and research institutes and 7 industries whose 2 are SMEs from 8 countries who will contribute to training by exchange of personnel and joint actions with other European projects and increase the competitiveness and sustainability of European industry by bringing innovative materials and new methods closer to the marked and permitting the establishment of energy infrastructures in areas with harsh climate and environmental conditions at acceptable costs.

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